Progress Towards An Improved Lifetime Experiment at Los Alamos Neutron Science Center

UCNτ+ is an upgrade to the UCNτ experiment at the Los Alamos Neutron Science Center. UCNτ has provided the most precise value for the neutron lifetime, a critical input for a nuclear structure-independent measurement of the CKM matrix element V_ud. The goal of UCNτ+ is to produce at least a factor of two improvement in the sensitivity of the UCNτ experiment, strongly motivated by the current status of the "Cabbibo-anomaly" in the couplings to up quarks. The UCNτ+ upgrade targets are increasing the loaded number of UCN in the magneto-gravitational trap and improving the high rate performance of the UCNτ extit{in situ} detector. We summarize modeling of the adiabatic loading system and the hardware progress for this experiment, providing an update on the mechanical design of UCNτ+, the testing program for the prototype system, and UCNτ+ commissioning. In addition, we discuss the performance of the UCNτ+ detector which was implemented during this previous run cycle.